• Assessment of the quantitative accuracy of Rietveld/XRD analysis of crystalline and amorphous phases in fly ash 

      Zhao, Piqi; Liu, Xianping; Gomez-de-la-Torre, Maria de los Angeles; Lu, Lingchao; Sobolev, Konstantin (2017)
      An internal standard method based on Rietveld/XRD whole-pattern fitting analysis of fly ash is used to assess the quantitative accuracy to determine its crystalline and amorphous phases under various conditions such as ...
    • Clinkering and hydration of belite-ye'elimite-alite cement 

      Londono-Zuluaga, Diana; Tobón, Jorge Iván; García-Aranda, Miguel Ángel; Santacruz-Cruz, Maria Isabel; Gomez-de-la-Torre, Maria de los Angeles (Elsevier, 2017)
      Some belite-ye´elimite-ferrite (BYF) cements present low mechanical strengths mainly due to the slow reactivity of belite. A solution to this problem may be the activation of BYF clinkers by preparing them with a coexistence ...
    • Difracción de rayos-x (DRX) y cementos: desde la investigación hasta el control de calidad 

      Garcia-Mate, Marta; Gomez-de-la-Torre, Maria de los Angeles; García-Aranda, Miguel Ángel (2019-06-20)
      Los materiales de construcción son componentes complejos de gran interés comercial. Por ello, el conocimiento cuantitativo de su mineralogía a través de la difracción de rayos X (DRX) es de crucial importancia para optimizar ...
    • Effect of calcium sulfate source on the hydration of calcium sulfoaluminate eco-cement 

      García-Maté, Marta; Gomez-de-la-Torre, Maria de los Angeles; León-Reina, Laura; Losilla, Enrique R.; García-Aranda, Miguel Ángel; [et al.] (2014)
      The availability of cements, including eco-cements, with tailored mechanical properties is very important for special applications in the building industry. Here we report a full study of the hydration of calcium sulfoaluminate ...
    • The effects of MgO, Na2O and SO3 on industrial clinkering process: phase composition, polymorphism, microstructure and hydration, using a multidisciplinary approach 

      Segata, Monica; Nicoletta, Marinoni; Matteo, Galimberti; Maurizio, Marchi; Marco, Cantaluppi; [et al.] (2019-07-02)
      The present investigation deals with how minor elements (their oxides: MgO, Na2O and SO3) in industrial kiln feeds affect (i) chemical reactions upon clinkering, (ii) resulting phase composition and microstructure ...
    • Hydration development and thermal performance of calcium sulphoaluminate cements containing microencapsulated phase change materials 

      Sanfelix, Susana G.; Zea-García, Jesús D.; Londono-Zuluaga, Diana; Santacruz-Cruz, Maria Isabel; Gomez-de-la-Torre, Maria de los Angeles; [et al.] (2020-03-24)
      Microencapsulated phase change materials (MPCM) incorporated in buildings walls can reduce indoor temperature fluctuations, conserving energy and enhancing thermal comfort. MPCM were incorporated in calcium sulphoaluminate ...
    • Hydration mechanisms of Ba-doped ye’elimite: effect of Ba/Ca ratio on hydration behavior 

      Zhao, Piqi; Bao, Xingyuan; Chen, Heng; Wang, Shoude; Lu, Lingchao; [et al.] (2020-09-28)
      Than stoichiometric one. However, the hydration mechanism is not well understood, in particular for the effect of Ba/Ca ratio on hydration behavior. To shed light on this issue, high purity C4-xBxA3$ samples with designed ...
    • Hydration mechanisms of two polymorphs of synthetic ye'elimite 

      Cuesta-Garcia, Ana Maria; Álvarez-Pinazo, Gema; Sanfeliz-Garcia, Susana; Peral, Inma; García-Aranda, Miguel Ángel; [et al.] (Elsevier, 2014-05-26)
      Ye'elimite is the main phase in calcium sulfoaluminate cements and also a key phase in sulfobelite cements. However, its hydrationmechanismis not well understood. Here we reported newdata on the hydration behavior of ...
    • Hydration of C4AF in the presence of other phases: A synchrotron X-ray powder diffraction study 

      Cuesta-Garcia, Ana Maria; Santacruz-Cruz, Maria Isabel; Sanfeliz-Garcia, Susana; Fauth, François; García-Aranda, Miguel Ángel; [et al.] (Elsevier, 2015)
      Hydration behaviour of C4AF in selected experimental conditions has been determined. C4AF has been hydrated in the absence and presence of gypsum, two polymorphs of ye’elimite and different water/solid ratios. C4AF in ...
    • Hydration Reactions and Mechanical Strength Developments of Iron- Rich Sulfobelite Eco-cements 

      Álvarez-Pinazo, Gema; Santacruz-Cruz, Maria Isabel; León-Reina, Laura; García-Aranda, Miguel Ángel; Gomez-de-la-Torre, Maria de los Angeles (2013)
      Belite calcium sulfoaluminate (BCSA) cements are low-CO2 building materials. However, their hydration behavior and its effect on mechanical properties have still to be clarified. Here, we report a full multitechnique study ...
    • Hydration studies of calcium sulfoaluminate cements blended with fly ash 

      García-Maté, Marta; Gomez-de-la-Torre, Maria de los Angeles; León-Reina, Laura; García-Aranda, Miguel Ángel; Santacruz-Cruz, Maria Isabel (Elsevier, 2013)
      The main objective of this work is to study the hydration and properties of calciumsulfoaluminate cement pastes blended with fly ash (FA) and the corresponding mortars at different hydration ages. Laboratory X-ray ...
    • In-situ early-age hydration study of sulfobelite cements by synchrotron powder diffraction 

      Álvarez-Pinazo, Gema; Cuesta-Garcia, Ana Maria; García-Maté, Marta; Santacruz-Cruz, Maria Isabel; Losilla, Enrique R.; [et al.] (Karen Scrivener, 2014)
      Eco-friendly belite calcium sulfoaluminate (BCSA) cement hydration behavior is not yet well understood. Here,we report an in-situ synchrotron X-ray powder diffraction study for the first hours of hydration of BCSA ...
    • Phase Transformation Dynamics in Sulfate-Loaded Lanthanide Triphosphonates. Proton Conductivity and Application as Fillers in PEMFCs 

      Ruiz Salcedo, Inés; Colodrero, Rosario M. P.; Bazaga García, Montse; López González, M. Mar C.; del Río, Carmen; [et al.] (ACS Publications. American Chemical Society, 2021)
      Phase transformation dynamics and proton conduction properties are reported for cationic layer-featured coordination polymers derived from the combination of lanthanide ions (Ln3+) with nitrilo-tris(methylenephosphonic ...
    • Processing and characterisation of standard and doped alite-belite-ye'elimite ecocement pastes and mortars 

      Zea-Garcia, Jesus D.; Gomez-de-la-Torre, Maria de los Angeles; García-Aranda, Miguel Ángel; Santacruz-Cruz, Maria Isabel (2020-02-26)
      Here, we report the processing optimisation of two laboratory-prepared alite-belite-ye'elimite ecocements (standard and doped) that release to the atmosphere ~13% less CO2 than Portland Cement during fabrication. The ...
    • Pseudo-cubic crystal structure and phase transition in doped ye'elimite 

      Cuesta-Garcia, Ana Maria; Gomez-de-la-Torre, Maria de los Angeles; Losilla, Enrique R.; Santacruz-Cruz, Maria Isabel; García-Aranda, Miguel Ángel (ACS publications, 2014)
      Sodalites are tridimensional alumino-silicate materials containing cages where loosely bonded anions are located. Ye'elimite, Ca4[Al6O12]SO4, is outstanding as an aluminate sodalite with a flexible framework accepting ...
    • Reactive belite stabilization mechanisms by boron-bearing dopants 

      Cuesta-Garcia, Ana Maria; Losilla, Enrique R.; García-Aranda, Miguel Ángel; Sanz, Jesús; Gomez-de-la-Torre, Maria de los Angeles (Elselvier, 2012-01-27)
      Belite-rich cements hold promise for reduced energy consumption and CO2 emissions, but their use is hindered by the slow hydration rates of ordinary belites. This drawback may be overcome by activation of belite by doping. ...
    • Rietveld Quantitative Phase Analysis of OPC Clinkers, Cements and Hydration Products 

      García-Aranda, Miguel Ángel; Gomez-de-la-Torre, Maria de los Angeles; León-Reina, Laura (Mineralogical Society of America, 2012)
    • Rietveld quantitative phase analysis of yeelimite-containing cements 

      Álvarez-Pinazo, Gema; Cuesta-Garcia, Ana Maria; García-Maté, Marta; Santacruz-Cruz, Maria Isabel; Losilla, Enrique R.; [et al.] (Karen Scrivener, 2012)
      Yeelimite-containing cements are attracting attention for their tailored properties. Calcium sulfoaluminate, CSA, cements have high contents of Yeelimite and they are used for special applications. Belite calcium sulfoaluminate, ...
    • Rietveld quantitative phase analysis with molybdenum radiation 

      Cuesta-Garcia, Ana Maria; Álvarez-Pinazo, Gema; Garcia-Mate, Marta; Santacruz-Cruz, Maria Isabel; García-Aranda, Miguel Ángel; [et al.] (Cambridge Core, 2014)
      Building materials are very complex samples of worldwide importance; hence quantitative knowledge of their mineralogical composition is necessary to predict performances. Rietveld quantitative phase analysis (RQPA) allows ...
    • Structure, Atomistic Simulations, and Phase Transition of Stoichiometric Yeelimite 

      Cuesta-Garcia, Ana Maria; Gomez-de-la-Torre, Maria de los Angeles; Losilla, Enrique R.; Peterson, Vanessa K.; Rejmak, Pawel; [et al.] (ACS publications, 2013)
      ABSTRACT: Yeelimite, Ca4[Al6O12]SO4, is outstanding as an aluminate sodalite, being the framework of these type of materials flexible and dependent on ion sizes and anion ordering/disordering. On the other hand, yeelimite ...